From: Jamie Lenehan <lenehan@twibble.org>
To: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Andrew Schulman <andrex@alumni.utexas.net>, linux-scsi@vger.kernel.org
Subject: Re: dc395x: can't write to tape
Date: Sun, 9 Jan 2005 23:51:17 +1100 [thread overview]
Message-ID: <20050109125116.GA6293@twibble.org> (raw)
In-Reply-To: <Pine.LNX.4.60.0501091238010.3910@poirot.grange>
On Sun, Jan 09, 2005 at 12:42:26PM +0100, Guennadi Liakhovetski wrote:
[...]
> The driver is full of "hardware bug workarounds". Jamie, are those PIO
> operations really needed? Do you ever see, that DMA doesn't transfer the
> last 1-3 bytes of the segment?
What I suspect those workarounds were added for was to handle a
driver bug with dealing with WIDE transfers. The dc315 doesn't
support WIDE transfers and that's the card I have.
I wouldn't mind removing all the PIO code and disabling support for
WIDE devices. It'll simplify various bits of code a lot and mean no
longer having to be concered about breaking things for the dc395 when
making changes.
[...]
> I could try to improve the highmem situation / sg-handling. Or do you plan
> to do it, Jamie?
It's on my list of things to do, but I doubt I'll have any time to do
anything about in the next few months. So if you have the time and
desire please go ahead! I'll can test any changes you make (with a
CD-R/W, tape-drive and HDD), although it may take me a week or two to
get around to it.
--
Jamie Lenehan <lenehan@twibble.org>
next prev parent reply other threads:[~2005-01-09 12:51 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-06 10:18 dc395x: can't write to tape Andrew Schulman
2005-01-06 21:48 ` Guennadi Liakhovetski
2005-01-07 10:52 ` Andrew Schulman
2005-01-07 20:13 ` Guennadi Liakhovetski
2005-01-08 21:42 ` Guennadi Liakhovetski
2005-01-11 15:19 ` Andrew Schulman
2005-01-11 22:16 ` Guennadi Liakhovetski
2005-01-12 8:58 ` Andrew Schulman
2005-01-09 5:33 ` Jamie Lenehan
2005-01-09 11:42 ` Guennadi Liakhovetski
2005-01-09 12:51 ` Jamie Lenehan [this message]
2005-01-22 23:20 ` Guennadi Liakhovetski
2005-01-27 1:13 ` Andrew Schulman
2005-01-27 20:45 ` Guennadi Liakhovetski
2005-02-06 22:11 ` [PATCH] dc395x fix memory mapping (was Re: dc395x: can't write to tape) Guennadi Liakhovetski
2005-02-21 22:01 ` Guennadi Liakhovetski
2005-02-23 10:16 ` Jamie Lenehan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20050109125116.GA6293@twibble.org \
--to=lenehan@twibble.org \
--cc=andrex@alumni.utexas.net \
--cc=g.liakhovetski@gmx.de \
--cc=linux-scsi@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox